Archive named X750J, likely relating to the ASUS X750J laptop series, though the name gives no brand, board number, revision or description of contents. Nearly 3 MB in size, it may hold a schematic, a boardview or several related files. Such documentation is used to follow the power-up sequence, trace rails, locate shorts and identify test points. After extracting, confirm which documents are inside and compare the board number and revision on the PCB with those in the files before using them.
The button opens the matching file on RM Schematics, or a source page if it is not catalogued there yet. The original attachment is from @notebookschematic. Enginerys does not host this file.
How to open a .zip file
Compressed archive that every operating system opens without extra software.